Gastropod Bay Site 4 (Cretaceous of Canada)

Also known as GB4

Where: Alberta, Canada (49.1° N, 110.5° W: paleocoordinates 56.3° N, 76.0° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Dinosaur Park Formation (Belly River Group), Late/Upper Campanian (83.5 - 70.6 Ma)

• from a channel lag within the 8-16 m thick Lethbridge coal zone

• bed-level stratigraphic resolution

Environment/lithology: estuary or bay; shelly/skeletal, sandy mudstone

• "heterolithic mudstone... thin, sandy, gastropod-shell-rich lags"

Size class: mesofossils

Collection methods: bulk, sieve,

Primary reference: D. A. Eberth and D. B. Brinkman. 1997. Paleoecology of an estuarine, incised-valley fill in the Dinosaur Park Formation (Judith River Group, Upper Cretaceous) of southern Alberta, Canada. Palaios 12:43-58 [J. Alroy/J. Alroy/J. Alroy]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 34313: authorized by John Alroy, entered by John Alroy on 26.08.2003

Creative Commons license: CC BY (attribution)

Taxonomic list

Chondrichthyes
 Hybodontiformes - Hybodontidae
Hybodus montanensis Case 1978 elasmobranch
 Myliobatiformes - Dasyatidae
Myledaphus bipartitus Cope 1876 whiptail stingray
 Chimaeriformes -
Chimaeriformes indet. Obruchev 1953 chimaera
"ratfish"
Actinopteri
 Acipenseriformes - Acipenseridae
Acipenser albertensis Lambe 1902 sturgeon
 Teleostei -
Teleostei "indet. R" Müller 1846
Teleostei "indet. S" Müller 1846
Teleostei "indet. A" Müller 1846
Teleostei "indet. G" Müller 1846
Teleostei "indet. L" Müller 1846
Teleostei "indet. F" Müller 1846
Teleostei "indet. Q" Müller 1846
 Teleostei - Aspidorhynchidae
 Elopiformes - Phyllodontidae
Paralbula casei Estes 1969
 Holostei -
 Amiiformes - Amiidae
Amiidae indet. Huxley 1861 bowfin
 Lepisosteiformes - Lepisosteidae
"Atractosteus occidentalis" = Lepisosteus occidentalis
"Atractosteus occidentalis" = Lepisosteus occidentalis Leidy 1856 gar
Osteichthyes
 Caudata - Urodela
Scapherpeton tectum Cope 1876 salamander
Aves
 Ornithurae -
? Baptornis sp. Marsh 1877 bird
Reptilia
 Crocodylia -
Leidyosuchus canadensis Lambe 1907 crocodilian
 Choristodera -
Champsosaurus natator Parks 1933 choristodere
 Plesiosauria -